US5904174A - Auxiliary tap valve - Google Patents

Auxiliary tap valve Download PDF

Info

Publication number
US5904174A
US5904174A US08/571,963 US57196395A US5904174A US 5904174 A US5904174 A US 5904174A US 57196395 A US57196395 A US 57196395A US 5904174 A US5904174 A US 5904174A
Authority
US
United States
Prior art keywords
auxiliary
valve
tap
fluid flow
valve member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US08/571,963
Other languages
English (en)
Inventor
Michael David Carew
Stephen James Lennie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LANWORTH ASIA Ltd
Lanworh Asia Ltd
Original Assignee
Lanworh Asia Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lanworh Asia Ltd filed Critical Lanworh Asia Ltd
Assigned to LANWORTH ASIA LIMITED reassignment LANWORTH ASIA LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CAREW, MICHAEL DAVID, LENNIE, STEPHEN JAMES
Application granted granted Critical
Publication of US5904174A publication Critical patent/US5904174A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K43/00—Auxiliary closure means in valves, which in case of repair, e.g. rewashering, of the valve, can take over the function of the normal closure means; Devices for temporary replacement of parts of valves for the same purpose
    • F16K43/005—Auxiliary closure means in valves, which in case of repair, e.g. rewashering, of the valve, can take over the function of the normal closure means; Devices for temporary replacement of parts of valves for the same purpose an auxiliary valve closing automatically when the main valve is being disassembled
    • F16K43/006—Auxiliary closure means in valves, which in case of repair, e.g. rewashering, of the valve, can take over the function of the normal closure means; Devices for temporary replacement of parts of valves for the same purpose an auxiliary valve closing automatically when the main valve is being disassembled the auxiliary valve being held open by the main valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/598—With repair, tapping, assembly, or disassembly means
    • Y10T137/6184—Removable valve with normally disabled supplemental check valve
    • Y10T137/6188—Check valve disabled by normally movable main valve part

Definitions

  • This invention relates to tap cocks and stop valves and in particular to an auxiliary tap valve either for retrofit or built in incorporation into screw down acting taps and valves for controlling fluid or water flow by automatically shutting off the flow of water through a tap during maintenance and reducing operating water flow to assist in water conservation.
  • valves, cocks and taps exist for controlling the flow and delivery of liquids and gases.
  • Such devices vary from the simple plug cocks which provide a transverse plug to interrupt the flow of a gas or liquid in a supply line, where the plug is provided with a hole capable of rotational alignment with the input and output supply lines to effect control over the flow of gases and liquids, to complex sluice valves involving a number of components.
  • a screw down stop valve is commonly incorporated into a tap cock such that a washer is made to bear down on an orifice through which water passes.
  • Such devices fall midway between simple plug cocks and complex valves and find extensive application in the control of water supply.
  • the screw down stop valve provides a screw operated spindle as an activating means for the washer such that a high degree of control can be exercised over the washer and therefore over the flow of water through the orifice.
  • Such screw down stop valves are commonly known as bib cocks and find wide application in domestic water control.
  • the bib cock provides a body through which water passes via an internal gate which is opened and closed by the screw action of a spindle urging a washer against the seat of an orifice in the gate to close off the water supply.
  • a spindle urging a washer against the seat of an orifice in the gate to close off the water supply.
  • the washer fails or wears out, as they are bound to do, it is necessary to arrest the supply of water to the tap in question before the washer can be removed and replaced.
  • Australian Patent Application No. 59752/80 discloses a valve assembly to enable repair work to be performed without having to shut off the water supply.
  • Australian Patent Application No. 70219/74 discloses an improved fluid valve involving a complex arrangement of valve members and springs adapted to close off the main water supply to a tap to facilitate maintenance.
  • the currently available devices operate in one of two ways
  • auxiliary valve in the form of a mechanical element like a spring which urges the valve closed;
  • One object of this invention is to provide an improved tap valve adapted to solve some of the foregoing problems.
  • the invention provides an auxiliary tap valve comprising a sleeve body with an auxiliary valve seat member and an auxiliary valve member supported within said sleeve body to be engageable with the auxiliary valve seat member to close the fluid flow through the valve.
  • the auxiliary tap valve is adapted for inter-engagement with the flow passage of a tap such that the auxiliary valve member is activated to open by the main valve member of the tap.
  • the auxiliary valve member has a first face substantially facing downstream of the fluid flow and a second face substantially facing upstream of the fluid flow such that the second face has a greater surface area exposed to the fluid flow than the first face.
  • the sleeve body has a restriction to constrict and limit the flow of fluid through the valve such that the combined venturi pressure drop on the downstream side of the auxiliary valve in conjunction with lift created by the differential surface areas of the first and second faces of the auxiliary valve urge the auxiliary valve toward the main valve during fluid flow, thereby urging the auxiliary valve to close, reducing turbulence clatter, and providing a positive operation of the valve.
  • the second face of the auxiliary valve member is preferably conical in shape with a flat profile and the first face is substantially flat such that not only does the upstream fluid flow across the conical face assist in providing a positive lift to the valve but the contemporaneous downstream fluid flow over the flat face provides a suction or negative lift acting in the same direction as the positive lift from the other side.
  • the sleeve body has constrictions or restrictions in the form of passageways in the sleeve body through which fluid must pass to traverse the taps gate.
  • the passageways may be of varying size and configuration in order to provide an optimal venturi effect to suck up the auxiliary valve as a result of the pressure drop across the sleeve body.
  • the size of the passageways can be adjusted to compensate for local water pressure and assist in water conservation.
  • the passageways are preferably formed in the spider of the sleeve body around a central hole used to support the stem of the auxiliary valve member.
  • the passageways preferably adopt a semicircular shape as a pair substantially surrounding the stem of the auxiliary valve member.
  • the passageways may be tapered in an orientation aligned with the flow of fluid through the sleeve body in the form of a part frustro conical shape with the broadest part of the passageways being upstream of the water flow such that the passageways form a substantially coaxial frustro conical opening in the spider of the sleeve body bridged by a traversing bar within which is housed the stem of the auxiliary valve.
  • the main valve member is most preferably a standard tap washer and is adapted to engage the auxiliary valve member by bearing down upon it during the normal operating action of the tap.
  • the valve is preferably sized to allow it to be optionally retrofitted into an existing standard tap by passing through the hole made available by removing the spindle bearing and seal.
  • the valve may also be prebuilt or manufactured de novo into a new tap.
  • FIG. 1 shows a cross-section of the auxiliary tap valve
  • FIG. 2 shows a plan view of the auxiliary tap valve
  • FIGS. 3-5 show a cross-section of a standard tap incorporating the auxiliary tap valve wherein
  • FIG. 3 shows the normal closed position of the standard tap valve
  • FIG. 4 shows the normal part open position of the standard tap valve
  • FIG. 4a show detail of the auxiliary tap valve during normal part open position of the tap.
  • FIG. 5 shows the full open position of the standard tap with the auxiliary valve member arresting the flow of fluid.
  • the auxiliary tap valve can be seen to comprise a sleeve body 2 having an optional external thread 1a to facilitate retro fitting of the valve into the body of a tap.
  • the auxiliary valve may alternatively be manufactured de nova and incorporated into a new tap design such that the external thread would not be required.
  • the sleeve body may be provided with a substitute main valve seat member 3 adapted to receive and sealably abut a main valve member (not shown).
  • the sleeve body is further provided with an auxiliary valve seat member 3a positioned opposite the main valve seat member, such that, upon fitting into a tap body the main and auxiliary valve seat members are positioned either side of the taps flow passage or internal gate 13 (see FIG. 3).
  • the valve is further provided with an auxiliary valve member 4 supported co-axially within the sleeve body.
  • the auxiliary valve member comprises a stem 5, a first face 6 of substantially flat configuration facing downstream or away from the water flow; and a second face 7 of a conical configuration facing upstream or toward the water flow; wherein the auxiliary valve member is free to move axially from an open position allowing free, albeit restricted movement of fluid through the sleeve body to a closed position where the first face 6 of the valve abuts the auxiliary valve seat member 3a and closes the valve.
  • the first face 6 may incorporate a chamfered edge to assist in the snug fitting to the seat.
  • the top extension of the stem 5a is positioned to allow interaction with the main valve member.
  • the underside of the main valve seat member 3 may be provided with a fiber or other type of washer 12 to ensure a fluid tight seal with the internal gate of the tap.
  • the sleeve body 2 may be a substantially solid construction provided with a central spider 15 to accommodate the valve stem 5 and apertures 16 to provide a passageway for fluid travel through the valve.
  • the apertures may be varied to permit differing levels of flow restriction and it is the restriction of flow through the apertures that provides a drop in local fluid pressure immediately downstream from the auxiliary valve such that the auxiliary valve member has suction applied thereto urging it to close.
  • the high upstream pressure also urges the auxiliary valve to close against the main valve.
  • the apertures are constructed in the spider of the sleeve body as reducing or tapering semi-circular holes surrounding the auxiliary valve stem 5.
  • the apertures have a part conical shape where the reduction of water flow provided by the apertures is enhanced by the reducing size of the apertures as they pass through the thickness of the spider.
  • the so formed reducing apertures provide for an acceleration of the flow of water to the downstream side of the valve which results in a pressure drop immediately behind the valve. The pressure drop facilitates the "sucking up" of the auxiliary valve member toward the closed position and thereby urges the valve to bear solidly onto the main valve by way of the stem extension 5a.
  • the semi-circular configuration of the apertures (seen in FIG. 2), further enhances the smooth flow of water through the valve by minimizing turbulence. In this manner, the valve design provides a first means of improving the passive closing action of this auxiliary valve.
  • the differential configuration of the upstream face 7 and the downstream face 6 of the auxiliary valve member is such that a greater surface area is exposed to the upstream fluid flow, which also has a greater pressure than the downstream fluid flow.
  • the greater surface area in conjunction with the higher pressure ensures that the valve is constantly pushed up to and against the main valve while the main valve is open.
  • the constant urging of the valve against the main valve ensures that the valve does not clatter about under any turbulence that may be created at the gate opening as fluid passes through the valve.
  • FIG. 2 shows a plan view of the auxiliary valve with the apertures 16 showing the restriction to fluid flow.
  • the size and configuration of the apertures may be varied according to the amount of flow restriction required.
  • the semicircular configuration around the stem 5a provides an enhanced smoothness and reduced turbulence in the operation of the valve.
  • FIGS. 3, 4, 4a and 5 detail the auxiliary tap valve in three progressive stages of operation as fitted to a standard tap to make up an auxiliary valve device.
  • the auxiliary tap valve may be prefitted and incorporated into the gate design of a new tap or retrofitted to an existing tap.
  • a standard tap 11 can be seen in the "off" position with the main valve member 10 of the tap 11 shut down so as to engage the main valve seat member 3 and seal off the flow passage or gate 13 of the tap.
  • the main valve member has fully depressed the auxiliary valve member 4, by co-operation with the top extension 5a of the auxiliary valve member 4.
  • the auxiliary valve at this stage has no operational effect at all.
  • FIGS. 4 and 4a detail the standard tap with the main valve member 10 partially open as in normal operation to allow fluid flow through the valve and tap body.
  • the main valve member 10 of the tap is opened up by turning on the tap handle 18 such that the main valve member 10 lifts off the main valve seat member 3.
  • the fluid begins to move through the valve from the upstream to the downstream and in so doing converges on to the constriction formed in the gate 13 by the auxiliary valve body 1 and the apertures 16.
  • the restriction of the fluid flow causes a drop in pressure of the fluid downstream of the auxiliary valve (downstream fluid 20) as compared to the pressure of the fluid upstream of the auxiliary valve (upstream fluid 21).
  • the difference in pressure in the two areas immediately surrounding the auxiliary valve causes a venturi effect which results in the auxiliary valve being sucked up into the gate 13 and thereby being pushed against the main valve member 10.
  • the particular configuration of the face of the auxiliary valve is such that the face of the auxiliary valve in contact with the upstream flow of fluid, the second or upstream face 7, has a conical shape of greater surface area than the other side of the face, the first or the downstream face 6.
  • the greater surface area of the second face in conjunction with the conical shape cause the flow of fluid past the auxiliary valve to lift the auxiliary valve up so as to further increase the pressure of the auxiliary valve onto the main valve 10.
  • the combined action of the venturi suction effect and the physical lift of the fluid flow ensure that the auxiliary valve is held snugly against the main valve member 10 and does not clatter about or have any tendency to "fall down" as a result of turbulence.
  • the auxiliary valve is serving the function of reducing water flow through the tap and thereby providing a means of conserving water.
  • the degree of restriction to water flow offered by the apertures 16 can be varied to provide greater reduction in areas of high water flow or pressure and can be enlarged to limit restriction in areas of low water flow or pressure.
  • FIG. 5 details the principle purpose of the auxiliary valve (besides water conservation).
  • the main tap valve member 10 is fully withdrawn such that the auxiliary valve member 4 engages the auxiliary valve seat member 3a to stop the fluid flow through the tap.
  • the spindle and spindle bearing can now be removed from the tap to access the main valve member 10 which can then be subject to maintenance or replacement.
  • the auxiliary valve member 4 in the meantime has substantially sealed off the fluid flow through the tap without the need to access mains supply taps or interrupt any other fluid supply other than the faulty tap. It may desirable in some situations to provide a less than perfect seal for the auxiliary valve so that drip occurs to avoid wear on the auxiliary valve during repair of a faulty main valve.
  • the spindle Upon replacement of the main valve member, the spindle can be replaced into the tap body and when the spindle is rotated the main valve member engages the stem 5a of the auxiliary valve member and opens up the auxiliary valve to resume normal fluid flow through the tap. Further depression of the main valve member serves to turn off the tap in the usual manner.
  • the invention may also be fitted to ceramic valve taps which do not rely on the same type of action as conventional valve taps.
  • the auxiliary valve shall come into operation during maintenance when the spindle of the ceramic valved tap is removed and the ceramic valve is only then lifted up and made to "release" the auxiliary valve to close off the supply.
  • auxiliary valves for retrofitting to existing taps and fully assembled taps in the form of a complete valve device incorporating the auxiliary valve.
  • the mounting of the auxiliary valve member is herein before described as a bush held in the sleeve of the auxiliary valve with the main tap valve merely bearing down onto the shaft of the valve.
  • other embodiments may include a fixed attachment of the main and auxiliary valves eliminating the need for an axial bush in the auxiliary valve.
  • the invention can be seen to provide a highly innovative and efficient auxiliary tap valve easily retrofitted to many existing taps to facilitate future maintenance of the taps.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)
  • Axle Suspensions And Sidecars For Cycles (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
US08/571,963 1993-06-28 1994-06-23 Auxiliary tap valve Expired - Fee Related US5904174A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPL9679 1993-06-28
AUPL967993 1993-06-28
PCT/AU1994/000341 WO1995000789A1 (en) 1993-06-28 1994-06-23 Auxiliary tap valve

Publications (1)

Publication Number Publication Date
US5904174A true US5904174A (en) 1999-05-18

Family

ID=3777015

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/571,963 Expired - Fee Related US5904174A (en) 1993-06-28 1994-06-23 Auxiliary tap valve

Country Status (6)

Country Link
US (1) US5904174A (de)
EP (1) EP0707694B1 (de)
JP (1) JPH08511607A (de)
AT (1) ATE189048T1 (de)
DE (1) DE69422713D1 (de)
WO (1) WO1995000789A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080251064A1 (en) * 2007-01-05 2008-10-16 Alberto Bellomo Gas manifold for a cooking range with an emergency tap
US20110186140A1 (en) * 2010-02-04 2011-08-04 O.M.T. Officina Meccanica Tartarini S.r.I. Gas Pressure Regulator
US11028942B2 (en) * 2014-06-17 2021-06-08 Jimmy One Limited Fluid control valve

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3554138B2 (ja) 1996-06-28 2004-08-18 キヤノン株式会社 インクジェット記録方法、インクジェット記録ヘッド及びインクジェット記録装置
AUPP510598A0 (en) * 1998-08-07 1998-08-27 Wonder Tap Pty Ltd Auxiliary valve member
EP1648722B1 (de) 2003-07-28 2011-07-06 Magna International Inc. Rahmenintegrierte hinterradaufhängung
ES2426465T3 (es) * 2008-12-22 2013-10-23 Artemis Intelligent Power Limited Conjunto de válvula
WO2014061104A1 (ja) * 2012-10-16 2014-04-24 三菱電機株式会社 絞り装置、および冷凍サイクル装置

Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE22472C (de) * A. SCHÄFFER in Hamburg, Alsterdamm 6 Verfahren zur Herstellung eines submarinen Tunnels
US104663A (en) * 1870-06-21 Improvement in faucets
US202639A (en) * 1878-04-23 Improvement in gage-cocks
US624855A (en) * 1899-05-09 parkes
US1082988A (en) * 1912-01-29 1913-12-30 Wolff Mfg Company L Faucet.
US1123801A (en) * 1915-01-05 Orpheus P Robinson Valve.
US1190530A (en) * 1913-10-06 1916-07-11 Milwaukee Brass Mfg Company Valve.
US1200268A (en) * 1916-03-27 1916-10-03 Ira W Cole Faucet.
US1242864A (en) * 1917-02-07 1917-10-09 George A Ricks Faucet.
US1401879A (en) * 1920-03-06 1921-12-27 Comings William Righter Valve, faucet, and the like
US1437136A (en) * 1921-05-31 1922-11-28 Charles H Freer Automatic safety check valve
US1605262A (en) * 1926-02-24 1926-11-02 Nielsen Faucet valve
US1610474A (en) * 1925-10-01 1926-12-14 Leopold W Richter Automatic auxiliary valve for pipe lines
US1831414A (en) * 1929-03-07 1931-11-10 Hamilton James Tap, cock, and the like
US2158566A (en) * 1935-10-28 1939-05-16 Joseph Ruml Water faucet
US2845003A (en) * 1955-08-22 1958-07-29 Magnavox Co Bomb arming system
US3262465A (en) * 1963-04-26 1966-07-26 Gillberg Arne Gunnar Device in a water tap
US3405729A (en) * 1965-10-01 1968-10-15 Stephen A Young Valve with two-way shut-off
US4763687A (en) * 1986-09-02 1988-08-16 Arth Michael J Faucet valve
US5110088A (en) * 1991-03-13 1992-05-05 Shih Sen Tien Water-control stopper

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1441987A (en) * 1920-09-07 1923-01-09 Thomas M Mcgrail Faucet
FR647324A (fr) * 1927-12-30 1928-11-22 Robinet de puisage pouvant servir de robinet d'arrêt
US2076805A (en) * 1935-08-14 1937-04-13 Wine Albert Faucet
FR924683A (fr) * 1946-04-02 1947-08-12 Perfectionnement apporté aux robinets à clapet
GB8928461D0 (en) * 1989-12-16 1990-02-21 Erwin William A Valve assemblies

Patent Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE22472C (de) * A. SCHÄFFER in Hamburg, Alsterdamm 6 Verfahren zur Herstellung eines submarinen Tunnels
US104663A (en) * 1870-06-21 Improvement in faucets
US202639A (en) * 1878-04-23 Improvement in gage-cocks
US624855A (en) * 1899-05-09 parkes
US1123801A (en) * 1915-01-05 Orpheus P Robinson Valve.
US1082988A (en) * 1912-01-29 1913-12-30 Wolff Mfg Company L Faucet.
US1190530A (en) * 1913-10-06 1916-07-11 Milwaukee Brass Mfg Company Valve.
US1200268A (en) * 1916-03-27 1916-10-03 Ira W Cole Faucet.
US1242864A (en) * 1917-02-07 1917-10-09 George A Ricks Faucet.
US1401879A (en) * 1920-03-06 1921-12-27 Comings William Righter Valve, faucet, and the like
US1437136A (en) * 1921-05-31 1922-11-28 Charles H Freer Automatic safety check valve
US1610474A (en) * 1925-10-01 1926-12-14 Leopold W Richter Automatic auxiliary valve for pipe lines
US1605262A (en) * 1926-02-24 1926-11-02 Nielsen Faucet valve
US1831414A (en) * 1929-03-07 1931-11-10 Hamilton James Tap, cock, and the like
US2158566A (en) * 1935-10-28 1939-05-16 Joseph Ruml Water faucet
US2845003A (en) * 1955-08-22 1958-07-29 Magnavox Co Bomb arming system
US3262465A (en) * 1963-04-26 1966-07-26 Gillberg Arne Gunnar Device in a water tap
US3405729A (en) * 1965-10-01 1968-10-15 Stephen A Young Valve with two-way shut-off
US4763687A (en) * 1986-09-02 1988-08-16 Arth Michael J Faucet valve
US5110088A (en) * 1991-03-13 1992-05-05 Shih Sen Tien Water-control stopper

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Search Report. *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080251064A1 (en) * 2007-01-05 2008-10-16 Alberto Bellomo Gas manifold for a cooking range with an emergency tap
US7634993B2 (en) * 2007-01-05 2009-12-22 Coprecitec, S.L. Gas manifold for a cooking range with an emergency tap
US20110186140A1 (en) * 2010-02-04 2011-08-04 O.M.T. Officina Meccanica Tartarini S.r.I. Gas Pressure Regulator
US8671983B2 (en) * 2010-02-04 2014-03-18 O.M.T. Officina Meccanica Tartarini S.R.L. Gas pressure regulator
US11028942B2 (en) * 2014-06-17 2021-06-08 Jimmy One Limited Fluid control valve

Also Published As

Publication number Publication date
EP0707694A4 (de) 1997-11-05
EP0707694B1 (de) 2000-01-19
DE69422713D1 (de) 2000-02-24
ATE189048T1 (de) 2000-02-15
WO1995000789A1 (en) 1995-01-05
JPH08511607A (ja) 1996-12-03
EP0707694A1 (de) 1996-04-24

Similar Documents

Publication Publication Date Title
KR930002799B1 (ko) 체크밸브겸 차단밸브
US5642752A (en) Controllable constant flow regulating lift valve
AU642936B2 (en) Diaphragm control valve
US3767164A (en) Throttle-shutoff valve
US5904174A (en) Auxiliary tap valve
US4887792A (en) Stop-check valve
US5188150A (en) Valve assembly
US20020145123A1 (en) Tilted and stepped diaphragm for control valves
US6135142A (en) Control valve device
USRE32981E (en) Anti-siphon and anti-knock diverter valve
RU2054137C1 (ru) Универсальный регулирующий клапан
US4951702A (en) Bidet valve
US5518019A (en) Diverter and volume control valve
AU694123B2 (en) Auxiliary tap valve
CA1293494C (en) Faucet spring
US1841456A (en) Flush valve
US20040079422A1 (en) Faucet manifold assembly with in-line integral stops
US4750519A (en) Faucet valve for buffering high-pressure water
WO1989008799A1 (en) Faucet with auxiliary closure for maintenance
US2117096A (en) Fluid control device
US2559268A (en) Faucet
US2102856A (en) Valve
RU2434170C1 (ru) Вентильная головка
AU2006100043A4 (en) Tap Valve Assembly
CN209325062U (zh) 一种船用截止阀的防尘装置

Legal Events

Date Code Title Description
AS Assignment

Owner name: LANWORTH ASIA LIMITED, VIRGIN ISLANDS, BRITISH

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CAREW, MICHAEL DAVID;LENNIE, STEPHEN JAMES;REEL/FRAME:007806/0509

Effective date: 19951227

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20030518